Miscellaneous Anticonvulsants

The miscellaneous anticonvulsants are contraindicated in patients with known hypersensitivity to any of the drugs. Carbamazepine is contraindicated in patients with bone marrow depression or hepatic or renal impairment and during pregnancy (Category D). Valproic acid is not administered to patients with renal impairment or during pregnancy (Category D). Oxcarbazepine (Trileptal), a miscellaneous anticonvulsant, may exacerbate dementia.

The miscellaneous anticonvulsants are used cautiously in patients with glaucoma or increased intraocular pressure; a history of cardiac, renal or liver dysfunction; and psychiatric disorders. When the miscellaneous anticonvulsants are used with other CNS depressants (eg, alcohol, narcotic analgesics, and antidepressants), an additive CNS depressant effect may occur.

When carbamazepine is administered with primidone, decreased primidone levels and higher carbamazepine serum levels may result. Cimetidine administered with carbamazepine may result in an increase in plasma levels of carbamazepine that can lead to toxicity. Blood levels of lamotrigine increase when the agent is administered with valproic acid, requiring a lower dosage of lamotrigine.

NURSING PROCESS

• The Patient Receiving an Anticonvulsant

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